Psilocybin Trends in States That Decriminalized Use JAMA March 12, 2026 Joshua C. Black, Gabrielle E. Bau, Ryan Cook et al. 2 citations This survey study examines the estimated increase in 12-month psilocybin use in Oregon and Colorado associated with decriminalization. DOI: 10.1001/jama.2026.1952 (opens in new tab) Psilocybin Hallucinogen Medline